#Cachediff

Cachediff is a tool to study the effect of cache performance between two versions (differing from each other by a small diff/delta) of the same C/C++ program. This is useful to students, educationist and professionals. Cachediff presents to the user a localized and global view of the cache and its statistics. It uses cache simulation based on instruction/memory tracing during execution. It can be extended to support n-versions of the same program.

##Usage

python cachediff.py program1.c program2.c input1.c input2.c

To run the test-suite

nosetests

##Example output

##Requirements

• Intel Pin

export PIN=/path/to/pin/folder

• DineroIV

export DINERO=/path/to/dinero/folder

• Disable ASLR(Dont forget to revert once done, this is a SECURITY HAZARD)

##Instruction Manual

1. Download the github-repo of Cachediff and extract the tar file.

2. Download the Intel Pin and extract the tar file and rename the folder to "pin".

3. Download the DineroIV and extract the tar file and rename the folder to dinero.

4. Now replace the the MyPinTool folder from

your_present_directory/pin/source/tools/MyPinTool to your_present_directory/cachediff/pin/source/tools/MyPinTool

This can be done by

your_present_directory$: rm -r pin/source/tools/MyPinTool
your_present_directory$: cp your_present_directory/cachediff/pin/source/tools/MyPinTool    pin/source/tools/

5. Make the Intel Pin

your_present_directory$: cd pin/source/tools/
your_present_directory$: make
your_present_directory$: cd ../../..

6. Make the DineroIV

your_present_directory$: cd dinero
your_present_directory$: make
your_present_directory$: cd ..

7. Set environmental variables :

your_present_directory$: echo "export PIN=/path/to/pin/folder" >> ~/.bashrc
your_present_directory$: echo "export PIN=/path/to/dinero/folder" >> ~/.bashrc
your_present_directory$: source ~/.bashrc

8. Disable ASLR

your_present_directory$: setarch `uname -m` -R /bin/bash

(Dont forget to revert once done, this is a SECURITY HAZARD)

9. Now you are ready to run the script,

python3 cachediff.py program1.c program2.c input_stream1.txt input_stream2.txt

where,

• program1.c - the original program
• program2.c - the modified version of the original program
• input_stream1 - input to program1
• input_stream2 - input to program2